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APPLICATION OF THE STIFFNESS CONCEPT TO TRANSVERSE PAVEMENT CRACKING IN OKLAHOMA

The paper reports on a study to investigate the behavior and response of Oklahoma asphalt binders and mixtures at low temperatures and to try to relate this behavior with field cracking data. The stiffness moduli of recovered field asphalt cements and mixtures were determined and results were related with the observed degree of pavement cracking. Different 85-100 penetration grade asphalt cement samples were secured from various sources in Oklahoma and their stiffness moduli were determined using N. W. McLeod's indirect method and compared to his recommended limiting values. The study also included determining the stiffness moduli of different penetration grades of asphalt binders and laboratory mixtures made from these asphalt cements.